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// Copyright 2018 The dexon-consensus-core Authors
// This file is part of the dexon-consensus-core library.
//
// The dexon-consensus-core library is free software: you can redistribute it
// and/or modify it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation, either version 3 of the License,
// or (at your option) any later version.
//
// The dexon-consensus-core library is distributed in the hope that it will be
// useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
// General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the dexon-consensus-core library. If not, see
// <http://www.gnu.org/licenses/>.
package types
import (
"bytes"
"encoding/json"
"fmt"
"io"
"github.com/dexon-foundation/dexon/rlp"
"github.com/dexon-foundation/dexon-consensus-core/common"
"github.com/dexon-foundation/dexon-consensus-core/core/crypto"
"github.com/dexon-foundation/dexon-consensus-core/core/crypto/dkg"
)
// DKGPrivateShare describe a secret share in DKG protocol.
type DKGPrivateShare struct {
ProposerID NodeID `json:"proposer_id"`
ReceiverID NodeID `json:"receiver_id"`
Round uint64 `json:"round"`
PrivateShare dkg.PrivateKey `json:"private_share"`
Signature crypto.Signature `json:"signature"`
}
// Equal checks equality between two DKGPrivateShare instances.
func (p *DKGPrivateShare) Equal(other *DKGPrivateShare) bool {
return p.ProposerID.Equal(other.ProposerID) &&
p.ReceiverID.Equal(other.ReceiverID) &&
p.Round == other.Round &&
p.Signature.Type == other.Signature.Type &&
bytes.Compare(p.Signature.Signature, other.Signature.Signature) == 0 &&
bytes.Compare(
p.PrivateShare.Bytes(), other.PrivateShare.Bytes()) == 0
}
// DKGMasterPublicKey decrtibe a master public key in DKG protocol.
type DKGMasterPublicKey struct {
ProposerID NodeID `json:"proposer_id"`
Round uint64 `json:"round"`
DKGID dkg.ID `json:"dkg_id"`
PublicKeyShares dkg.PublicKeyShares `json:"public_key_shares"`
Signature crypto.Signature `json:"signature"`
}
func (d *DKGMasterPublicKey) String() string {
return fmt.Sprintf("MasterPublicKey[%s:%d]",
d.ProposerID.String()[:6],
d.Round)
}
// Equal check equality of two DKG master public keys.
func (d *DKGMasterPublicKey) Equal(other *DKGMasterPublicKey) bool {
return d.ProposerID.Equal(other.ProposerID) &&
d.Round == other.Round &&
d.DKGID.GetHexString() == other.DKGID.GetHexString() &&
d.PublicKeyShares.Equal(&other.PublicKeyShares) &&
d.Signature.Type == other.Signature.Type &&
bytes.Compare(d.Signature.Signature, other.Signature.Signature) == 0
}
type rlpDKGMasterPublicKey struct {
ProposerID NodeID
Round uint64
DKGID []byte
PublicKeyShares *dkg.PublicKeyShares
Signature crypto.Signature
}
// EncodeRLP implements rlp.Encoder
func (d *DKGMasterPublicKey) EncodeRLP(w io.Writer) error {
return rlp.Encode(w, rlpDKGMasterPublicKey{
ProposerID: d.ProposerID,
Round: d.Round,
DKGID: d.DKGID.GetLittleEndian(),
PublicKeyShares: &d.PublicKeyShares,
Signature: d.Signature,
})
}
// DecodeRLP implements rlp.Decoder
func (d *DKGMasterPublicKey) DecodeRLP(s *rlp.Stream) error {
var dec rlpDKGMasterPublicKey
if err := s.Decode(&dec); err != nil {
return err
}
id, err := dkg.BytesID(dec.DKGID)
if err != nil {
return err
}
*d = DKGMasterPublicKey{
ProposerID: dec.ProposerID,
Round: dec.Round,
DKGID: id,
PublicKeyShares: *dec.PublicKeyShares,
Signature: dec.Signature,
}
return err
}
// NewDKGMasterPublicKey returns a new DKGMasterPublicKey instance.
func NewDKGMasterPublicKey() *DKGMasterPublicKey {
return &DKGMasterPublicKey{
PublicKeyShares: *dkg.NewEmptyPublicKeyShares(),
}
}
// UnmarshalJSON implements json.Unmarshaller.
func (d *DKGMasterPublicKey) UnmarshalJSON(data []byte) error {
type innertDKGMasterPublicKey DKGMasterPublicKey
d.PublicKeyShares = *dkg.NewEmptyPublicKeyShares()
return json.Unmarshal(data, (*innertDKGMasterPublicKey)(d))
}
// DKGComplaint describe a complaint in DKG protocol.
type DKGComplaint struct {
ProposerID NodeID `json:"proposer_id"`
Round uint64 `json:"round"`
PrivateShare DKGPrivateShare `json:"private_share"`
Signature crypto.Signature `json:"signature"`
}
func (c *DKGComplaint) String() string {
if c.IsNack() {
return fmt.Sprintf("DKGNackComplaint[%s:%d]%s",
c.ProposerID.String()[:6], c.Round,
c.PrivateShare.ProposerID.String()[:6])
}
return fmt.Sprintf("DKGComplaint[%s:%d]%v",
c.ProposerID.String()[:6], c.Round, c.PrivateShare)
}
// Equal checks equality between two DKGComplaint instances.
func (c *DKGComplaint) Equal(other *DKGComplaint) bool {
return c.ProposerID.Equal(other.ProposerID) &&
c.Round == other.Round &&
c.PrivateShare.Equal(&other.PrivateShare) &&
c.Signature.Type == other.Signature.Type &&
bytes.Compare(c.Signature.Signature, other.Signature.Signature) == 0
}
// DKGPartialSignature describe a partial signature in DKG protocol.
type DKGPartialSignature struct {
ProposerID NodeID `json:"proposer_id"`
Round uint64 `json:"round"`
Hash common.Hash `json:"hash"`
PartialSignature dkg.PartialSignature `json:"partial_signature"`
Signature crypto.Signature `json:"signature"`
}
// DKGFinalize describe a dig finalize message in DKG protocol.
type DKGFinalize struct {
ProposerID NodeID `json:"proposer_id"`
Round uint64 `json:"round"`
Signature crypto.Signature `json:"signature"`
}
func (final *DKGFinalize) String() string {
return fmt.Sprintf("DKGFinal[%s:%d]",
final.ProposerID.String()[:6],
final.Round)
}
// Equal check equality of two DKGFinalize instances.
func (final *DKGFinalize) Equal(other *DKGFinalize) bool {
return final.ProposerID.Equal(other.ProposerID) &&
final.Round == other.Round &&
final.Signature.Type == other.Signature.Type &&
bytes.Compare(final.Signature.Signature, other.Signature.Signature) == 0
}
// IsNack returns true if it's a nack complaint in DKG protocol.
func (c *DKGComplaint) IsNack() bool {
return len(c.PrivateShare.Signature.Signature) == 0
}
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